Yazar "Bakir, Ahmet Kerem" seçeneğine göre listele

Listeleniyor 1 - 7 / 7
  • Küçük Resim Yok
    Öğe
    Checklist of Cnidaria and Ctenophora from the coasts of Turkey
    (Tubitak Scientific & Technical Research Council Turkey, 2014) Cinar, Melih Ertan; Yokes, Mehmet Baki; Acik, Sermin; Bakir, Ahmet Kerem
    This paper presents the actual status of species diversity of the phyla Cnidaria and Ctenophora along the Turkish coasts of the Black Sea, the Sea of Marmara, the Aegean Sea, and the Levantine Sea. A total of 195 cnidarian species belonging to 5 classes (Hydrozoa, Cubozoa, Scyphozoa, Staurozoa, and Anthozoa) have been determined in these regions. Eight anthozoan species (Arachnanthus oligopodus, Bunodactis rubripunctata, Bunodeopsis strumosa, Corynactis viridis, Halcampoides purpureus, Sagartiogeton lacerates, Sagartiogeton undatus, and Pachycerianthus multiplicatus) are reported for the first time as elements of the Turkish marine fauna in the present study. The highest number of cnidarian species (121 species) was reported from the Aegean Sea, while the lowest (17 species) was reported from the Black Sea. The hot spot areas for cnidarian diversity are the Prince Islands, Istanbul Strait, Izmir Bay, and Datca Peninsula, where relatively intensive scientific efforts have been carried out. Regarding ctenophores, 7 species are distributed along the Turkish coasts, 5 of which were reported from the Black Sea. A total of 16 alien cnidarian and 2 ctenophore species were determined in the regions. Two species (Sagartiogeton laceratus and Pachycerianthus multiplicatus) are new alien species for the Mediterranean Sea and could have been introduced to the northern part of the Sea of Marmara and Iskenderun Bay, areas from which these species are recorded, by ships from the North-East Atlantic.
  • Küçük Resim Yok
    Öğe
    Decapod crustaceans in benthic habitats of the Turkish Straits System with new records
    (Walter De Gruyter Gmbh, 2018) Bakir, Ahmet Kerem; Ates, A. Suat
    The objective of this study was to investigate decapod species occurring in the Turkish Straits System. For this purpose, benthic samples were collected from six different biotopes (photophilic algae, Cystoseira barbata, meadows, Posidonia oceanica, mussel, Mytilus galloprovincialis, meadows, Zostera marina, serpulid reef, and rocks) at depths ranging from 10 to 1000 m. A total of 60 species of decapod crustaceans were identified, including new records for the Turkish Straits System: Processa elegantula, P. modica, Richardina fredericii, Callianassa subterranea, Gourretia denticulata, Inachus parvirostris and Macropodia linaresi. In addition, some information about the spatial and bathymetric distribution as well as biotope preferences of the decapod community is provided.
  • Küçük Resim Yok
    Öğe
    Distribution of littoral benthic amphipods off the Levantine coast of Turkey with new records
    (Tubitak Scientific & Technical Research Council Turkey, 2014) Bakir, Ahmet Kerem; Katagan, Tuncer
    A total of 143 species belonging to Amphipoda were found at the depths between the supralittoral zone and 200 m along the Levantine coast of Turkey. Ten species (Ampelisca spinifer, Cheiriphotis mediterranea, Deutella shieckei, Ericthonius argenteus, Gammaropsis crenulata, Gammaropsis sophiae, Isaea montagui, Ischyrocerus inexpectatus, Liropus elongatus, and Melita bulla) were recorded for the first time in Turkey, while 69 species were new for the Levantine coast of Turkey. Platorchestia platensis was the only species observed out of water (supralittoral). The other encountered species showed distribution in various depths of between 0 and 200 m. The biogeographical categories of determined species were Mediterranean-Atlantic (69.2%), Mediterranean endemics (20.3%), cosmopolitans (8.4%), and Indo-Pacific immigrants (2.1%), including Elasmopus pectenicrus, Gammaropsis togoensis, and Stenothoe gallensis.
  • Küçük Resim Yok
    Öğe
    Exotic Polychaetes of a Sewage Pollution Influenced Lagoon (cardak Lagoon, Turkish Straits)
    (MDPI, 2023) Dagli, Ertan; Ates, Abdullah Suat; Acar, Secil; Buyukates, Yesim; Dogan, Alper; Bakir, Ahmet Kerem
    This paper includes three exotic polychaeta species, Hydroides dianthus (Verrill, 1873), Polydora cornuta Bosc, 1802, and Pseudopolydora paucibranchiata (Okuda, 1937), found during benthic samplings in cardak Lagoon (Turkish Straits). The sampling was collected from the sandy and silty bottoms known to be polluted by sewage discharges. A total of 45 specimens of exotic polychaetes (H. dianthus: 1; P. cornuta: 4; P. paucibranchiata: 40) were found. The correlation values between the annual average values of the nutrients and the polychaeta abundance showed that the highest positive relationships with the abundance were between sand content, total phosphate, and pH. P. cornuta was the most observed species with a frequency index value of 75%, while H. dianthus was represented with a single species in the study area. Albeit the previous studies, P. paucibranchiata was observed most abundantly in the sampling station having low organic matter amounts. The study showed that opportunistic polychaetes observed in cardak Lagoon mostly preferred organically poor sediments.
  • Küçük Resim Yok
    Öğe
    Fouling and boring organisms that deteriorate various European and tropical woods at Turkish seas
    (Academic Journals, 2010) Sen, Selim; Sivrikaya, Huseyin; Yalcin, Mesut; Bakir, Ahmet Kerem; Ozturk, Bilal
    This study aims to investigate the diversity of fouling and boring organisms damaging wood material at Turkish coasts. Trials were carried out at six harbour sites throughout the seas surrounding Turkey. Various Euopean and tropical wood samples were hanged down at a depth of six meters in the sea for a period of one year. Identification of the organisms obtained from wood panels revealed the presence of five wood borer and 26 fouling species. Iskenderun harbour had the highest boring organism diversity (five species) and it was followed by Trabzon and Finike harbours (three species) and Bandirma, Eregli and Alacati harbours (two species). The two molluscan boring species, Teredo navalis and Lyrodus pedicellatus were observed at all harbour sites, but Nototeredo norvegica was at Trabzon and Iskenderun harbours only. Bankia carinata was obtained only at Iskenderun harbour and the crustacean wood borer Limnoria tripunctata was found at Finike and Iskenderun harbours. All native tree species, except for the olive, were significantly damaged by fouling and boring organisms.
  • Küçük Resim Yok
    Öğe
    The marine arthropods of Turkey
    (Tubitak Scientific & Technical Research Council Turkey, 2014) Bakir, Ahmet Kerem; Katagan, Tuncer; Aker, Halim Vedat; Ozcan, Tahir; Sezgin, Murat; Ates, Abdullah Suat; Kocak, Cengiz; Kirkim, Fevzi
    This recent checklist of marine arthropods found on the coasts of Turkey represents a total of 1531 species belonging to 7 classes: Malacostraca (766 species), Maxillopoda (437 species), Ostracoda (263 species), Pycnogonida (27 species), Arachnida (26 species), Branchiopoda (7 species), and Insecta (5 species). Seventy-five species were classified as alien species in the region. This paper also includes the first record of the amphipod Melita valesi from the Levantine coast of Turkey (Kas, Gulf of Antalya).
  • Küçük Resim Yok
    Öğe
    Temporal and spatial effects of environmental variables on crustacean communities in cardak Lagoon (Turkish Straits System) under the influence of domestic pollution
    (Springer, 2023) Ates, Abdullah Suat; Mulayim, Aysegul; Bakir, Ahmet Kerem; Acar, Secil; Buyukates, Yesim; Dagli, Ertan; Dogan, Alper
    This study presents the temporal and spatial effects of domestic pollution on crustacean assemblages in a protected area, cardak Lagoon (Turkish Straits System). The samplings were performed from sandy and mud (silt + clay) bottoms between 1 and 1.8 m depths in October 2018, February, April, and June 2019. A total of 6920 specimens and 26 species (1 Isopoda, 1 Tanaidacea, 2 Mysidacea, 3 Cumacea, 5 Decapoda, 14 Amphipoda) belonging to crustaceans was found. Highest crustacea abundances were in autumn and winter. Considering the environmental variables, NO2 + NO3 (mg L- 1) and COD (mg L- 1) levels in the water had the highest correlations with abundance for the sampling periods. According to sampling points, the highest correlation value was found between anionic detergent content in the water and the abundance. Crustacean community structure was modified by environmental variables of anthropogenic origin at a higher level. Oxygen, oxygen reduction potential, NO2 + NO3, total nitrogen, chemical oxygen demand and anionic surfactant levels in water and sediment sand content % were major environmental variables affecting the crustacean abundance in the study area temporally.